perl function join

The join function in Perl is used to concatenate elements of a list into a single string, separated by a specified delimiter. It takes two arguments: the delimiter and the list of elements to join.

Here's an example that demonstrates how to use join:

#!/usr/bin/perl

use strict;
use warnings;

# Define a list of strings
my @words = ("foo", "bar", "baz");

# Join the strings with a comma delimiter
my $string = join(",", @words);

# Print the result
print "List: @words\n";
print "String: $string\n";

In this example, we start by defining a list of three strings: foo, bar, and baz. We then use the join function to concatenate the strings with a comma delimiter, resulting in a single string "foo,bar,baz". We assign this string to a variable called $string.

We then print both the original list of words and the joined string to the console using print.

Note that the delimiter specified to join can be any string, not just a single character. Also note that join does not add a delimiter after the last element in the list, so there will be no trailing delimiter in the resulting string.